Vetra USB Protocol Converters can be used in many applications to connect RS-232 data sources to PC’s, MAC’s and other computers equipped with an USB port. The RS-232 ASCII coded data appears as keyboard input to the PC. Industrial control, point-of-sale, bar code readers, instrumentation, structured test, compatibility test, and data acquisition are some of the many areas where Vetra Protocol Converters have found effective application. The USB-335 allows the connection of additional keyboards via the on-board 2 port hub, or directly into any other USB port. When utilizing the USB-335's 2 port on-board hub, the total draw of the connected devices should not exceed 400mA. The USB-335 is powered by the PC's USB port, so no external power supply is normally required. Compared to the VIP-335 Protocol Converter for PC PS/2 keyboard input, the USB-335 takes advantage of the higher input rate of the USB keyboard input and offers a higher RS-232 input character rate. Burst-oriented applications, such as bar code wands and bar code readers are likely to benefit from the higher USB character rate.

Description: The USB-335 “SmartPipe”™ Protocol Converter allows RS-232 data to be fed directly into a USB port as keyboard data. The standard ASCII code set, common in RS-232 applications, does not correspond to the codes of the standard USB keyboard, requiring translation between ASCII and USB keyboard codes. The Vetra USB-335 Protocol Converter performs these ASCII code to USB keyboard code translations. Additional keyboards can also be connected via the on-board 2 port hub, or directly into any other USB port. Code Conversion for the USB-335: The USB-335 “SmartPipe”™ translates ASCII codes to equivalent USB keyboard codes as shown in the "ASCII to USB Key Code Translation" Table. Note that the table contains more codes than the standard ASCII set. These codes have been added to bring the functionality of keyboards used with PC’s and MAC’s into the ASCII world. Simulation of simultaneous depression of some keys is possible using the separate “make” and “break” codes for the Control, Shift, and Alt keys, both left and right. For instance, to simulate the Left Alt and F1 keys combination, hex codes 83, A0, 93 should be sent. In addition to code translation, the converter also converts voltage and protocol from the asynchronous RS-232 protocol to the USB bit-synchronous, TTL level, NRZI message-oriented protocol. The male DB-9 connector on the USB-335 receives RS-232 data on pin 2, and controls Clear-To-Send (CTS) on pin 7. Pin 5 is ground. For an Application Note with more information on CTS behavior and throughput rates click here. The USB-335 uses the following RS-232 format: 1 start bit, 1 stop bit, 8 data bits, and no parity. There are six baud rates to choose from: 300, 1200, 2400, 4800, 9600 and 19,200 baud.

Features: Designed and manufactured in the USA Backed by a Limited 3 Year Warranty Converts RS-232 ASCII data to USB keyboard data Allows connection of additional keyboards or USB devices via on-board 2 port hub Custom versions available

Models: USB-335: Converts RS-232 input data to USB Keyboard codes. $179.00 USB-335-OEM: Same as above, assembled PCB only (PCB dimensions). $109.00 All prices subject to change without notice. For International Representatives click here.

Connections: A standard USB Type A-B cables, provided with the unit, is used to connect the USB-335 converter to a USB port of the PC or MAC. The USB port can be directly on the computer or on a hub connected to the computer. A cable terminated in a standard DB-9 female connector is required to interface RS-232 data to the converter. Specifications: Dimensions for the USB-335 Protocol Converter are 1.5 in H x 5.08 in W x 5.25 in D (3.81 cm x 12.90 cm x 13.34 cm). For dimension data for the USB-335-OEM click here. The USB-335 is powered by the PC's USB port, so no external power supply is required unless the total current draw of devices connected to the on-board hub exceeds 400mA. The housing is molded of black GE Cycolac-T, a high impact ABS material, and is internally shielded with an acrylic base nickel coating for RFI attenuation. Front and rear panels are fabricated from .062 in thick aluminium and finished with low gloss black paint. FCC and CE marked. Shipping weight is less than 2 lbs per unit.

Environmental	Operating Temp: Storage Temp:	5 to 104 deg. F (-15 - 40 deg. C)  -4 to 122 deg. F (-20 - 50 deg. C)
Supported Hardware	Computer: Peripherals:	IBM PC/AT, PS/2 and 100% compatibles AT and PS/2 keyboards
SmartPipe is a trademark of Vetra Systems Corporation, Copyright © 1995-2005 by Vetra Systems Corporation, All Rights Reserved

For user instructions for the USB-335 click here.
For user instructions in PDF format.
For a copy of Adobe's Acrobat® Reader™.

All Vetra Systems products are proudly designed and manufactured in the USA for enterprise mission-critical applications and are backed by a Limited 3 Year Warranty

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VETRA Systems Corporation 275-J Marcus Blvd. Ste-J Hauppauge, NY 11788-2022 USA Toll Free 1-800-537-9296 Tel: 631-434-3185 Fax: 631-434-3516 e-mail: sales@vetra.com